Plot synopsis: Guan Yu, who was a soldier, has a meticulous mind, rigorous style, and extremely hard physical and mental quality. He has solved numerous major and small cases. From a simple and fierce little white criminal policeman, he has grown all the way to a wise and experienced Lanhe County Criminal Police Team Captain. Guan Yu's physical condition went from bad to worse after being promoted to captain of the criminal police. After the 1223 major case, Guan Yu was faced with danger. Under the pressure of time, pressure from superiors, and the loss of relatives and comrades in arms, the black hand of evil is still hidden under the glacier. In the face of this case with many intertwined and implicated cases, can Guan Yu hold high the light of justice and the fire of hope in his hands?